JSP如何取得局域网内计算机的Mac地址
我想在我的网站上建个投票系统，但是担心刷票，所以想取得所有机器的Mac地址，对于局域网内的计算机的Mac地址，怎么才能取得呢？各位大侠，帮帮我吧，谢谢

------解决方案--------------------
import java.io.*;
import java.net.InetAddress;

public class GetMac
{
//通过IP获取网卡地址
public String getMacByIP(String serverIP)
{
String str = " ";
String macAddress = " ";
try
{

Process pp = Runtime.getRuntime().exec( "nbtstat -A "+serverIP);
InputStreamReader ir = new InputStreamReader(pp.getInputStream());
LineNumberReader input = new LineNumberReader(ir);
for(int i = 1;i < 100;i++)
{
str = input.readLine();
if(str != null)
{
if(str.indexOf( "MAC Address ") > 1)
{
macAddress = str.substring(str.indexOf( "MAC Address ")+14,str.length());
break;
}
}
}
}
catch(IOException ex)
{
ex.printStackTrace();
}
return macAddress;
}
//通过机器名获取网卡地址
public String getMacByServerName(String serverName)
{
String str = " ";
String macAddress = " ";
try
{

Process pp = Runtime.getRuntime().exec( "nbtstat -a "+serverName);
InputStreamReader ir = new InputStreamReader(pp.getInputStream());
LineNumberReader input = new LineNumberReader(ir);
for(int i = 1;i < 100;i++)
{
str = input.readLine();
if(str != null)
{
if(str.indexOf( "MAC Address ") > 1)
{
macAddress = str.substring(str.indexOf( "MAC Address ")+14,str.length());
break;
}
}
}
}
catch(IOException ex)
{
ex.printStackTrace();
}
return macAddress;
}


public static void main(String[] args)
{
try
{

GetMac getmac;
getmac=new GetMac();
String mac= " ";
mac=getmac.getMacByIP( "192.168.1.57 ");
System.out.println(mac);
mac=getmac.getMacByServerName( "server ");
System.out.println(mac);
}
catch( Exception e )
{
System.out.println( e.getMessage() );
}
}
}
供你参考